export type ChildMotionWarmupStepId =
  | 'center_arrive'
  | 'wave_greeting'
  | 'warmup_intro'
  | 'move_left'
  | 'return_center_1'
  | 'move_right'
  | 'return_center_2'
  | 'wave_left_hand'
  | 'wave_right_hand'
  | 'warmup_finish'
  | 'level_select';

export type ChildMotionWarmupTarget = 'center' | 'left' | 'right';

export type ChildMotionWarmupStepKind =
  | 'position'
  | 'gesture'
  | 'narration'
  | 'finish'
  | 'levelSelect';

export type ChildMotionWarmupStep = {
  id: ChildMotionWarmupStepId;
  kind: ChildMotionWarmupStepKind;
  title: string;
  spokenLines: string[];
  target?: ChildMotionWarmupTarget;
};

export type ChildMotionPoint = {
  x: number;
  y: number;
  isRaised?: boolean;
  isArmExtended?: boolean;
  armAngleDeg?: number;
  armReach?: number;
};

export type ChildMotionHandSpace = {
  minX: number;
  maxX: number;
  minY: number;
  maxY: number;
  minAngleDeg: number | null;
  maxAngleDeg: number | null;
  maxReach: number | null;
};

export type ChildMotionWarmupCalibration = {
  leftBoundary: number | null;
  rightBoundary: number | null;
  leftHandPath: ChildMotionPoint[];
  rightHandPath: ChildMotionPoint[];
  leftHandSpace: ChildMotionHandSpace | null;
  rightHandSpace: ChildMotionHandSpace | null;
};

export type ChildMotionWarmupCompletion =
  | {
      type: 'position';
      avatarX: number;
    }
  | {
      type: 'left-hand';
      path: ChildMotionPoint[];
    }
  | {
      type: 'right-hand';
      path: ChildMotionPoint[];
    }
  | {
      type: 'narration';
    };

export const CHILD_MOTION_CENTER_X = 0.5;
export const CHILD_MOTION_LEFT_X = 0.34;
export const CHILD_MOTION_RIGHT_X = 0.66;
export const CHILD_MOTION_POSITION_EPSILON = 0.045;
export const CHILD_MOTION_HOLD_DURATION_MS = 2000;
export const CHILD_MOTION_NARRATION_DURATION_MS = 900;
export const CHILD_MOTION_FINISH_DURATION_MS = 1200;

export const CHILD_MOTION_WARMUP_STEPS: ChildMotionWarmupStep[] = [
  {
    id: 'center_arrive',
    kind: 'position',
    title: '来到圆圈这里',
    spokenLines: ['欢迎你，小朋友，见到你真开心', '来圆圈这里和我打个招呼吧'],
    target: 'center',
  },
  {
    id: 'wave_greeting',
    kind: 'gesture',
    title: '打个招呼',
    spokenLines: ['来圆圈这里和我打个招呼吧'],
  },
  {
    id: 'warmup_intro',
    kind: 'narration',
    title: '准备热身',
    spokenLines: ['你好呀小朋友，为了你玩的安全和开心，先来和我一起热个身吧'],
  },
  {
    id: 'move_left',
    kind: 'position',
    title: '向左一步',
    spokenLines: ['向左一步'],
    target: 'left',
  },
  {
    id: 'return_center_1',
    kind: 'position',
    title: '回到中间来',
    spokenLines: ['回到中间来'],
    target: 'center',
  },
  {
    id: 'move_right',
    kind: 'position',
    title: '向右一步',
    spokenLines: ['向右一步'],
    target: 'right',
  },
  {
    id: 'return_center_2',
    kind: 'position',
    title: '回到中间来',
    spokenLines: ['回到中间来'],
    target: 'center',
  },
  {
    id: 'wave_left_hand',
    kind: 'gesture',
    title: '挥动左手',
    spokenLines: ['挥动左手'],
  },
  {
    id: 'wave_right_hand',
    kind: 'gesture',
    title: '挥动右手',
    spokenLines: ['挥动右手'],
  },
  {
    id: 'warmup_finish',
    kind: 'finish',
    title: '热身完成',
    spokenLines: ['真厉害，你是我见过最聪明的小朋友', '别走开，现在开始我们的游戏吧'],
  },
  {
    id: 'level_select',
    kind: 'levelSelect',
    title: '准备开始',
    spokenLines: ['现在开始我们的游戏吧'],
  },
];

const STEP_BY_ID = new Map(
  CHILD_MOTION_WARMUP_STEPS.map((step) => [step.id, step]),
);

const NEXT_STEP_BY_ID = new Map<ChildMotionWarmupStepId, ChildMotionWarmupStepId>(
  CHILD_MOTION_WARMUP_STEPS.slice(0, -1).map((step, index) => [
    step.id,
    CHILD_MOTION_WARMUP_STEPS[index + 1]!.id,
  ]),
);

let childMotionWarmupCompletedInRuntime = false;

export function getChildMotionWarmupStep(id: ChildMotionWarmupStepId) {
  return STEP_BY_ID.get(id) ?? CHILD_MOTION_WARMUP_STEPS[0]!;
}

export function getChildMotionTargetX(target: ChildMotionWarmupTarget) {
  if (target === 'left') {
    return CHILD_MOTION_LEFT_X;
  }

  if (target === 'right') {
    return CHILD_MOTION_RIGHT_X;
  }

  return CHILD_MOTION_CENTER_X;
}

export function isAvatarOnWarmupTarget(
  step: ChildMotionWarmupStep,
  avatarX: number,
) {
  if (step.kind !== 'position' || !step.target) {
    return false;
  }

  return (
    Math.abs(avatarX - getChildMotionTargetX(step.target)) <=
    CHILD_MOTION_POSITION_EPSILON
  );
}

export function resolveNextChildMotionWarmupStep(
  stepId: ChildMotionWarmupStepId,
) {
  return NEXT_STEP_BY_ID.get(stepId) ?? stepId;
}

export function createEmptyChildMotionCalibration(): ChildMotionWarmupCalibration {
  return {
    leftBoundary: null,
    rightBoundary: null,
    leftHandPath: [],
    rightHandPath: [],
    leftHandSpace: null,
    rightHandSpace: null,
  };
}

function resolveChildMotionHandSpace(
  path: ChildMotionPoint[],
): ChildMotionHandSpace | null {
  if (path.length === 0) {
    return null;
  }

  const xValues = path.map((point) => point.x);
  const yValues = path.map((point) => point.y);
  const angleValues = path
    .map((point) => point.armAngleDeg)
    .filter((angle): angle is number => typeof angle === 'number');
  const reachValues = path
    .map((point) => point.armReach)
    .filter((reach): reach is number => typeof reach === 'number');

  return {
    minX: Math.min(...xValues),
    maxX: Math.max(...xValues),
    minY: Math.min(...yValues),
    maxY: Math.max(...yValues),
    minAngleDeg: angleValues.length > 0 ? Math.min(...angleValues) : null,
    maxAngleDeg: angleValues.length > 0 ? Math.max(...angleValues) : null,
    maxReach: reachValues.length > 0 ? Math.max(...reachValues) : null,
  };
}

export function applyChildMotionWarmupCompletion(
  stepId: ChildMotionWarmupStepId,
  calibration: ChildMotionWarmupCalibration,
  completion: ChildMotionWarmupCompletion,
): ChildMotionWarmupCalibration {
  if (stepId === 'move_left' && completion.type === 'position') {
    return {
      ...calibration,
      leftBoundary: Math.max(0, CHILD_MOTION_CENTER_X - completion.avatarX),
    };
  }

  if (stepId === 'move_right' && completion.type === 'position') {
    return {
      ...calibration,
      rightBoundary: Math.max(0, completion.avatarX - CHILD_MOTION_CENTER_X),
    };
  }

  if (stepId === 'wave_left_hand' && completion.type === 'left-hand') {
    return {
      ...calibration,
      leftHandPath: completion.path,
      leftHandSpace: resolveChildMotionHandSpace(completion.path),
    };
  }

  if (stepId === 'wave_right_hand' && completion.type === 'right-hand') {
    return {
      ...calibration,
      rightHandPath: completion.path,
      rightHandSpace: resolveChildMotionHandSpace(completion.path),
    };
  }

  return calibration;
}

export function hasCompletedChildMotionWarmupInRuntime() {
  return childMotionWarmupCompletedInRuntime;
}

export function markChildMotionWarmupCompletedInRuntime() {
  childMotionWarmupCompletedInRuntime = true;
}

export function resetChildMotionWarmupRuntimeSession() {
  childMotionWarmupCompletedInRuntime = false;
}